How do I change my RSVP?
Return to your invitation and choose Change answer while replies are open.
Open the invitation using the same email address you used to reply. Choose Change answer, update your response or household details, and submit it again.
You can also return through the Invited shelf on your events screen.
If the option is missing or the form says replies are closed, contact your host directly. They can help with a late change. Sending a message to product support does not tell your host that your plans have changed.
Updated